diff --git a/Allwmake b/Allwmake
index 0f69c87181b11004af7fabdbcedaf759fef8c531..de7a288ec875893f761e459094ac0415d1af658f 100755
--- a/Allwmake
+++ b/Allwmake
@@ -15,6 +15,12 @@ cd ${0%/*} && wmakeCheckPwd "$WM_PROJECT_DIR" 2>/dev/null || {
 . $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
 
 #------------------------------------------------------------------------------
+echo "========================================"
+date "+%Y-%m-%d %H:%M:%S %z" 2>/dev/null || echo "date is unknown"
+echo "Starting ${WM_PROJECT_DIR##*/} ${0##*}"
+echo "  $WM_COMPILER $WM_COMPILER_TYPE compiler"
+echo "  ${WM_OPTIONS}, with ${WM_MPLIB} ${FOAM_MPI}"
+echo
 
 # Compile wmake support applications
 (cd wmake/src && make)
diff --git a/etc/bashrc b/etc/bashrc
index 91da6b9e1b57963608db52410989dabc0884c782..cc8b0a87d32d759568465224c7e9df4dd656e903 100644
--- a/etc/bashrc
+++ b/etc/bashrc
@@ -57,18 +57,19 @@ export FOAM_INST_DIR
 # $FOAM_INST_DIR/site/$WM_PROJECT_VERSION or $FOAM_INST_DIR/site
 
 #- Compiler location:
-#    WM_COMPILER_TYPE= system | ThirdParty
+#    WM_COMPILER_TYPE = system | ThirdParty
 export WM_COMPILER_TYPE=system
 
 #- Compiler:
-#    WM_COMPILER= Gcc | Gcc4[8-9] | Gcc5[1-4] | Gcc6[1-3] | Clang | Icc | IccKNL
+#    WM_COMPILER = Gcc | Gcc4[8-9] | Gcc5[1-4] | Gcc6[1-3] | GccKNL
+#                  | Clang | Clang3[8-9] | Icc | IccKNL
 export WM_COMPILER=Gcc
 unset WM_COMPILER_ARCH WM_COMPILER_LIB_ARCH
 
 #- Memory addressing:
-#    On a 64bit OS this can be 32bit or 64bit
-#    On a 32bit OS addressing is 32bit and this option is not used
 #    WM_ARCH_OPTION = 32 | 64
+#    - on a 64-bit OS this can be 32 or 64
+#    - on a 32-bit OS addressing is 32-bit and this option is not used
 export WM_ARCH_OPTION=64
 
 #- Precision:
diff --git a/etc/config.csh/compiler b/etc/config.csh/compiler
index 18b2f226c89dd40baeecffd6eda0aba346706361..61b560e5a26db68a4f37c759a069c298849b4f34 100644
--- a/etc/config.csh/compiler
+++ b/etc/config.csh/compiler
@@ -31,6 +31,7 @@
 #------------------------------------------------------------------------------
 
 switch ("$WM_COMPILER_TYPE")
+case OpenFOAM:
 case ThirdParty:
     # Default versions of GMP, MPFR and MPC, override as necessary
     set gmp_version=gmp-system
@@ -67,22 +68,36 @@ case ThirdParty:
         set gcc_version=gcc-6.3.0
         breaksw
     case Clang:
-        set clang_version=llvm-3.7.0
-        # set clang_version=llvm-3.8.0
+        set clang_version=llvm-3.7.1
+        breaksw
+    case Clang38:
+        set clang_version=llvm-3.8.1
+        breaksw
+    case Clang39:
+        set clang_version=llvm-3.9.1
+        breaksw
+    case Clang40:
+        set clang_version=llvm-4.0.0
         breaksw
     default:
-        echo
-        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/compiler:"
-        echo "    Unknown OpenFOAM compiler type '$WM_COMPILER'"
-        echo "    Please check your settings"
-        echo
+        /bin/cat << UNKNOWN_COMPILER
+===============================================================================
+Warning in $WM_PROJECT_DIR/etc/config.csh/compiler:
+Unknown ThirdParty compiler type/version - '$WM_COMPILER'
+
+Please check your settings
+===============================================================================
+UNKNOWN_COMPILER
         breaksw
     endsw
+
+    setenv WM_COMPILER_TYPE ThirdParty  # Canonical name
+    breaksw
 endsw
 
-# common settings (system or ThirdParty)
+# Common settings (system or ThirdParty)
 switch ("$WM_COMPILER")
-case Clang:
+case Clang*:
     # Using clang - not gcc
     setenv WM_CC 'clang'
     setenv WM_CXX 'clang++'
diff --git a/etc/config.csh/mpi b/etc/config.csh/mpi
index dca6ff23f7c2afa34e4629124f218e096423cab1..ac3f3788cd689bcdaba4775de19d8df87e369b68 100644
--- a/etc/config.csh/mpi
+++ b/etc/config.csh/mpi
@@ -76,7 +76,7 @@ case SYSTEMMPI:
 
     if ( ! ($?MPI_ROOT) ) then
         echo
-        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/settings:"
+        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/mpi:"
         echo "    Please set the environment variable MPI_ROOT to point to" \
              " the base folder for the system MPI in use."
         echo "    Example:"
@@ -88,7 +88,7 @@ case SYSTEMMPI:
 
         if ( ! ($?MPI_ARCH_FLAGS) ) then
             echo
-            echo "Warning in $WM_PROJECT_DIR/etc/config.csh/settings:"
+            echo "Warning in $WM_PROJECT_DIR/etc/config.csh/mpi:"
             echo "    MPI_ARCH_FLAGS is not set. Example:"
             echo
             echo '        setenv MPI_ARCH_FLAGS "-DOMPI_SKIP_MPICXX"'
@@ -97,7 +97,7 @@ case SYSTEMMPI:
 
         if ( ! ($?MPI_ARCH_INC) ) then
             echo
-            echo "Warning in $WM_PROJECT_DIR/etc/config.csh/settings:"
+            echo "Warning in $WM_PROJECT_DIR/etc/config.csh/mpi:"
             echo "    MPI_ARCH_INC is not set. Example:"
             echo
             echo '        setenv MPI_ARCH_INC "-isystem $MPI_ROOT/include"'
@@ -106,7 +106,7 @@ case SYSTEMMPI:
 
         if ( ! ($?MPI_ARCH_LIBS) ) then
             echo
-            echo "Warning in $WM_PROJECT_DIR/etc/config.csh/settings:"
+            echo "Warning in $WM_PROJECT_DIR/etc/config.csh/mpi:"
             echo "    MPI_ARCH_LIBS is not set. Example:"
             echo
             echo '        setenv MPI_ARCH_LIBS "-L$MPI_ROOT/lib -lmpi"'
@@ -194,7 +194,7 @@ case SGIMPI:
     if ( ! $?MPI_ROOT) setenv MPI_ROOT /dummy
 
     if ( ! -d "$MPI_ROOT" ) then
-        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/settings:"
+        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/mpi:"
         echo "    MPI_ROOT not a valid mpt installation directory."
         echo "    Please set MPI_ROOT to the mpt installation directory."
         echo "    (usually done by loading the mpt module)"
@@ -208,14 +208,12 @@ case SGIMPI:
     setenv FOAM_MPI ${MPI_ROOT:t}
     setenv MPI_ARCH_PATH $MPI_ROOT
 
-
     if ($?FOAM_VERBOSE && $?prompt) then
         echo "Using SGI MPT:"
         echo "    MPI_ROOT : $MPI_ROOT"
         echo "    FOAM_MPI : $FOAM_MPI"
     endif
 
-
     _foamAddPath    $MPI_ARCH_PATH/bin
     _foamAddLib     $MPI_ARCH_PATH/lib
     breaksw
@@ -224,7 +222,7 @@ case INTELMPI:
     if ( ! $?MPI_ROOT) setenv MPI_ROOT /dummy
 
     if ( ! -d "$MPI_ROOT" ) then
-        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/settings:"
+        echo "Warning in $WM_PROJECT_DIR/etc/config.csh/mpi:"
         echo "    MPI_ROOT not a valid mpt installation directory."
         echo "    Please set MPI_ROOT to the mpt installation directory."
         echo "    (usually done by loading the mpt module)"
@@ -238,14 +236,12 @@ case INTELMPI:
     setenv FOAM_MPI ${MPI_ROOT:t}
     setenv MPI_ARCH_PATH $MPI_ROOT
 
-
     if ($?FOAM_VERBOSE && $?prompt) then
         echo "Using INTEL MPT:"
         echo "    MPI_ROOT : $MPI_ROOT"
         echo "    FOAM_MPI : $FOAM_MPI"
     endif
 
-
     _foamAddPath    $MPI_ARCH_PATH/bin64
     _foamAddLib     $MPI_ARCH_PATH/lib64
     breaksw
diff --git a/etc/config.csh/settings b/etc/config.csh/settings
index 3a668acf2d15930f7634ba498aad213c72bd3eea..8e048e2323f4e9f03aa7dab44d89ae836b6461af 100644
--- a/etc/config.csh/settings
+++ b/etc/config.csh/settings
@@ -54,13 +54,14 @@ case Linux:
         breaksw
 
     case x86_64:
+        if ( ! $?WM_ARCH_OPTION ) setenv WM_ARCH_OPTION 64  # Default to 64-bit
         switch ($WM_ARCH_OPTION)
         case 32:
             setenv WM_COMPILER_ARCH 64
             setenv WM_CC 'gcc'
             setenv WM_CXX 'g++'
             setenv WM_CFLAGS '-m32 -fPIC'
-            setenv WM_CXXFLAGS '-m32 -fPIC -std=c++0x'
+            setenv WM_CXXFLAGS '-m32 -fPIC -std=c++11'
             setenv WM_LDFLAGS '-m32'
             breaksw
 
@@ -70,7 +71,7 @@ case Linux:
             setenv WM_CC 'gcc'
             setenv WM_CXX 'g++'
             setenv WM_CFLAGS '-m64 -fPIC'
-            setenv WM_CXXFLAGS '-m64 -fPIC -std=c++0x'
+            setenv WM_CXXFLAGS '-m64 -fPIC -std=c++11'
             setenv WM_LDFLAGS '-m64'
             breaksw
 
@@ -92,7 +93,7 @@ case Linux:
         setenv WM_CC 'gcc'
         setenv WM_CXX 'g++'
         setenv WM_CFLAGS '-m64 -fPIC'
-        setenv WM_CXXFLAGS '-m64 -fPIC -std=c++0x'
+        setenv WM_CXXFLAGS '-m64 -fPIC -std=c++11'
         setenv WM_LDFLAGS '-m64'
         breaksw
 
@@ -102,7 +103,7 @@ case Linux:
         setenv WM_CC 'gcc'
         setenv WM_CXX 'g++'
         setenv WM_CFLAGS '-m64 -fPIC'
-        setenv WM_CXXFLAGS '-m64 -fPIC -std=c++0x'
+        setenv WM_CXXFLAGS '-m64 -fPIC -std=c++11'
         setenv WM_LDFLAGS '-m64'
         breaksw
 
@@ -120,17 +121,17 @@ case SunOS:
     setenv WM_CC 'gcc'
     setenv WM_CXX 'g++'
     setenv WM_CFLAGS '-mabi=64 -fPIC'
-    setenv WM_CXXFLAGS '-mabi=64 -fPIC -std=c++0x'
+    setenv WM_CXXFLAGS '-mabi=64 -fPIC -std=c++11'
     setenv WM_LDFLAGS '-mabi=64 -G0'
     breaksw
 
-default:  # An unsupported operating system
-    /bin/cat <<USAGE
-
-Your "$WM_ARCH" operating system is unsupported by this OpenFOAM release.
+default:
+    /bin/cat << UNSUPPORTED_OS
+===============================================================================
+Your '$WM_ARCH' operating system is unsupported by this OpenFOAM release.
 For further assistance, please contact www.OpenFOAM.com
-
-USAGE
+===============================================================================
+UNSUPPORTED_OS
     breaksw
 
 endsw
@@ -219,7 +220,6 @@ case system:
     # Use system compiler
     breaksw
 
-case OpenFOAM:
 case ThirdParty:
     if ( $?gcc_version ) then
         if ( ! $?gmp_version  ) set gmp_version=gmp-system
@@ -301,9 +301,15 @@ CLANG_NOT_FOUND
     breaksw
 
 default:
-    echo "Warn: WM_COMPILER_TYPE='$WM_COMPILER_TYPE' is unsupported"
-    echo "   treating as 'system' instead"
+    /bin/cat << UNKNOWN_TYPE
+===============================================================================
+Unknown WM_COMPILER_TYPE="$WM_COMPILER_TYPE" - treating as 'system'
+Please check your settings
+===============================================================================
+UNKNOWN_TYPE
+    setenv WM_COMPILER_TYPE system
     breaksw
+
 endsw
 
 
diff --git a/etc/config.sh/compiler b/etc/config.sh/compiler
index 1f9907710b31a7925b89dbf650790ccf0049064a..78f8c42b1bd8cde341a0b72fb6a4992de85ce4d3 100644
--- a/etc/config.sh/compiler
+++ b/etc/config.sh/compiler
@@ -31,7 +31,7 @@
 #------------------------------------------------------------------------------
 
 case "$WM_COMPILER_TYPE" in
-ThirdParty)
+OpenFOAM | ThirdParty)
     # Default versions of GMP, MPFR and MPC, override as necessary
     gmp_version=gmp-system
     mpfr_version=mpfr-system
@@ -66,23 +66,35 @@ ThirdParty)
         gcc_version=gcc-6.3.0
         ;;
     Clang)
-        clang_version=llvm-3.7.0
-        # clang_version=llvm-3.8.0
+        clang_version=llvm-3.7.1
+        ;;
+    Clang38)
+        clang_version=llvm-3.8.1
+        ;;
+    Clang39)
+        clang_version=llvm-3.9.1
+        ;;
+    Clang40)
+        clang_version=llvm-4.0.0
         ;;
     *)
-        echo 1>&2
-        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/compiler:" 1>&2
-        echo "    Unknown OpenFOAM compiler type '$WM_COMPILER'" 1>&2
-        echo "    Please check your settings" 1>&2
-        echo 1>&2
+        /bin/cat << UNKNOWN_COMPILER 1>&2
+===============================================================================
+Warning in $WM_PROJECT_DIR/etc/config.sh/compiler:
+Unknown ThirdParty compiler type/version - '$WM_COMPILER'
+
+Please check your settings
+===============================================================================
+UNKNOWN_COMPILER
         ;;
     esac
+    WM_COMPILER_TYPE=ThirdParty # Canonical name
     ;;
 esac
 
-# common settings (system or ThirdParty)
+# Common settings (system or ThirdParty)
 case "$WM_COMPILER" in
-Clang)
+Clang*)
     # Using clang - not gcc
     export WM_CC='clang'
     export WM_CXX='clang++'
diff --git a/etc/config.sh/mpi b/etc/config.sh/mpi
index d26e5eefb02abefe56570f7fcbe841592dc36862..dd64a8649b0d4a6e4141d7c9866ee10a2eb8c238 100644
--- a/etc/config.sh/mpi
+++ b/etc/config.sh/mpi
@@ -81,7 +81,7 @@ SYSTEMMPI)
     if [ -z "$MPI_ROOT" ]
     then
         echo 1>&2
-        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/settings:" 1>&2
+        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/mpi:" 1>&2
         echo "    Please set the environment variable MPI_ROOT to point to" \
              " the base folder for the system MPI in use." 1>&2
         echo "    Example:" 1>&2
@@ -94,7 +94,7 @@ SYSTEMMPI)
         if [ -z "$MPI_ARCH_FLAGS" ]
         then
             echo 1>&2
-            echo "Warning in $WM_PROJECT_DIR/etc/config.sh/settings:" 1>&2
+            echo "Warning in $WM_PROJECT_DIR/etc/config.sh/mpi:" 1>&2
             echo "    MPI_ARCH_FLAGS is not set. Example:" 1>&2
             echo 1>&2
             echo "        export MPI_ARCH_FLAGS=\"-DOMPI_SKIP_MPICXX\"" 1>&2
@@ -104,7 +104,7 @@ SYSTEMMPI)
         if [ -z "$MPI_ARCH_INC" ]
         then
             echo 1>&2
-            echo "Warning in $WM_PROJECT_DIR/etc/config.sh/settings:" 1>&2
+            echo "Warning in $WM_PROJECT_DIR/etc/config.sh/mpi:" 1>&2
             echo "    MPI_ARCH_INC is not set. Example:" 1>&2
             echo 1>&2
             echo "        export MPI_ARCH_INC=\"-isystem \$MPI_ROOT/include\"" 1>&2
@@ -114,7 +114,7 @@ SYSTEMMPI)
         if [ -z "$MPI_ARCH_LIBS" ]
         then
             echo 1>&2
-            echo "Warning in $WM_PROJECT_DIR/etc/config.sh/settings:" 1>&2
+            echo "Warning in $WM_PROJECT_DIR/etc/config.sh/mpi:" 1>&2
             echo "    MPI_ARCH_LIBS is not set. Example:" 1>&2
             echo 1>&2
             echo "        export MPI_ARCH_LIBS=\"-L\$MPI_ROOT/lib -lmpi\"" 1>&2
@@ -208,7 +208,7 @@ SGIMPI)
 
     if [ ! -d "$MPI_ROOT" -o -z "$MPI_ARCH_PATH" ]
     then
-        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/settings:" 1>&2
+        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/mpi:" 1>&2
         echo "    MPI_ROOT not a valid mpt installation directory or ending" \
              " in a '/'." 1>&2
         echo "    Please set MPI_ROOT to the mpt installation directory." 1>&2
@@ -235,7 +235,7 @@ INTELMPI)
 
     if [ ! -d "$MPI_ROOT" -o -z "$MPI_ARCH_PATH" ]
     then
-        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/settings:" 1>&2
+        echo "Warning in $WM_PROJECT_DIR/etc/config.sh/mpi:" 1>&2
         echo "    MPI_ROOT not a valid mpt installation directory or ending" \
              " in a '/'." 1>&2
         echo "    Please set MPI_ROOT to the mpt installation directory." 1>&2
diff --git a/etc/config.sh/settings b/etc/config.sh/settings
index d342ed47e43d490db631436436273d90ae475480..259d61ace9f14e0f2364cea4de83af658ca655f3 100644
--- a/etc/config.sh/settings
+++ b/etc/config.sh/settings
@@ -44,18 +44,19 @@ Linux)
         export WM_CC='gcc'
         export WM_CXX='g++'
         export WM_CFLAGS='-fPIC'
-        export WM_CXXFLAGS='-fPIC -std=c++0x'
+        export WM_CXXFLAGS='-fPIC -std=c++11'
         export WM_LDFLAGS=
         ;;
 
     x86_64)
+        : ${WM_ARCH_OPTION:=64}; export WM_ARCH_OPTION  # Default to 64-bit
         case "$WM_ARCH_OPTION" in
         32)
             export WM_COMPILER_ARCH=64
             export WM_CC='gcc'
             export WM_CXX='g++'
             export WM_CFLAGS='-m32 -fPIC'
-            export WM_CXXFLAGS='-m32 -fPIC -std=c++0x'
+            export WM_CXXFLAGS='-m32 -fPIC -std=c++11'
             export WM_LDFLAGS='-m32'
             ;;
         64)
@@ -64,7 +65,7 @@ Linux)
             export WM_CC='gcc'
             export WM_CXX='g++'
             export WM_CFLAGS='-m64 -fPIC'
-            export WM_CXXFLAGS='-m64 -fPIC -std=c++0x'
+            export WM_CXXFLAGS='-m64 -fPIC -std=c++11'
             export WM_LDFLAGS='-m64'
             ;;
         *)
@@ -85,7 +86,7 @@ Linux)
         export WM_CC='gcc'
         export WM_CXX='g++'
         export WM_CFLAGS='-fPIC'
-        export WM_CXXFLAGS='-fPIC -std=c++0x'
+        export WM_CXXFLAGS='-fPIC -std=c++11'
         export WM_LDFLAGS=
         ;;
 
@@ -95,7 +96,7 @@ Linux)
         export WM_CC='gcc'
         export WM_CXX='g++'
         export WM_CFLAGS='-m64 -fPIC'
-        export WM_CXXFLAGS='-m64 -fPIC -std=c++0x'
+        export WM_CXXFLAGS='-m64 -fPIC -std=c++11'
         export WM_LDFLAGS='-m64'
         ;;
 
@@ -105,7 +106,7 @@ Linux)
         export WM_CC='gcc'
         export WM_CXX='g++'
         export WM_CFLAGS='-m64 -fPIC'
-        export WM_CXXFLAGS='-m64 -fPIC -std=c++0x'
+        export WM_CXXFLAGS='-m64 -fPIC -std=c++11'
         export WM_LDFLAGS='-m64'
         ;;
 
@@ -122,17 +123,17 @@ SunOS)
     export WM_CC='gcc'
     export WM_CXX='g++'
     export WM_CFLAGS='-mabi=64 -fPIC'
-    export WM_CXXFLAGS='-mabi=64 -fPIC -std=c++0x'
+    export WM_CXXFLAGS='-mabi=64 -fPIC -std=c++11'
     export WM_LDFLAGS='-mabi=64 -G0'
     ;;
 
 *)  # An unsupported operating system
-    /bin/cat <<USAGE 1>&2
-
-Your "$WM_ARCH" operating system is unsupported by this OpenFOAM release.
+    /bin/cat << UNSUPPORTED_OS 1>&2
+===============================================================================
+Your '$WM_ARCH' operating system is unsupported by this OpenFOAM release.
 For further assistance, please contact www.OpenFOAM.com
-
-USAGE
+===============================================================================
+UNSUPPORTED_OS
     ;;
 esac
 
@@ -217,7 +218,8 @@ case "$WM_COMPILER_TYPE" in
 system)
     # Use system compiler
     ;;
-OpenFOAM | ThirdParty)
+
+ThirdParty)
     if [ -n "$gcc_version" ]
     then
         gccDir=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER_ARCH/$gcc_version
@@ -297,9 +299,15 @@ CLANG_NOT_FOUND
     unset clang_version clangDir
     ;;
 *)
-    echo "Warn: WM_COMPILER_TYPE='$WM_COMPILER_TYPE' is unsupported" 1>&2
-    echo "   treating as 'system' instead" 1>&2
+    /bin/cat << UNKNOWN_TYPE 1>&2
+===============================================================================
+Unknown WM_COMPILER_TYPE="$WM_COMPILER_TYPE" - treating as 'system'
+Please check your settings
+===============================================================================
+UNKNOWN_TYPE
+    export WM_COMPILER_TYPE=system
     ;;
+
 esac
 
 #------------------------------------------------------------------------------
diff --git a/etc/cshrc b/etc/cshrc
index e8319d258cf5147f164d66d5ecf5c38841368e58..10165e0964e5f9491231cb8a34949b13018722e2 100644
--- a/etc/cshrc
+++ b/etc/cshrc
@@ -60,15 +60,16 @@ setenv FOAM_INST_DIR `lsof +p $$ |& grep -oE '/.*'$WM_PROJECT'[^/]*/etc/cshrc' |
 setenv WM_COMPILER_TYPE system
 
 #- Compiler:
-#    WM_COMPILER= Gcc | Gcc4[8-9] | Gcc5[1-4] | Gcc6[1-3] | Clang | Icc | IccKNL
+#    WM_COMPILER = Gcc | Gcc4[8-9] | Gcc5[1-4] | Gcc6[1-3] | GccKNL
+#                  | Clang | Clang3[8-9] | Icc | IccKNL
 setenv WM_COMPILER Gcc
 setenv WM_COMPILER_ARCH # defined but empty
 unsetenv WM_COMPILER_LIB_ARCH
 
 #- Memory addressing:
-#    On a 64bit OS this can be 32bit or 64bit
-#    On a 32bit OS addressing is 32bit and this option is not used
 #    WM_ARCH_OPTION = 32 | 64
+#    - on a 64-bit OS this can be 32 or 64
+#    - on a 32-bit OS addressing is 32-bit and this option is not used
 setenv WM_ARCH_OPTION 64
 
 #- Precision:
diff --git a/wmake/rules/linux64Clang/c++ b/wmake/rules/linux64Clang/c++
index 1b5156617971b8312a5fb1bc608fe6fdcd7d856a..014eff3461fae216b0201f0cb3016f3154a7fa22 100644
--- a/wmake/rules/linux64Clang/c++
+++ b/wmake/rules/linux64Clang/c++
@@ -1,6 +1,6 @@
 SUFFIXES += .C
 
-c++WARN     = -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-c++11-extensions
+c++WARN     = -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-undefined-var-template
 
 # Suppress some warnings for flex++ and CGAL
 c++LESSWARN = -Wno-old-style-cast -Wno-unused-local-typedefs -Wno-tautological-undefined-compare -Wno-shift-negative-value
diff --git a/wmake/rules/linuxClang/c++ b/wmake/rules/linuxClang/c++
index b2001baf2e492dd45521de43ae2598080509b59e..746cdb13bb6ae08d8b12f9b88893469935ca7779 100644
--- a/wmake/rules/linuxClang/c++
+++ b/wmake/rules/linuxClang/c++
@@ -1,9 +1,9 @@
 SUFFIXES += .C
 
-c++WARN     = -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-c++11-extensions
+c++WARN     = -Wall -Wextra -Wold-style-cast -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof -Wno-undefined-var-template
 
 # Suppress some warnings for flex++ and CGAL
-c++LESSWARN = -Wno-old-style-cast -Wno-unused-local-typedef -Wno-tautological-undefined-compare -Wno-shift-negative-value
+c++LESSWARN = -Wno-old-style-cast -Wno-unused-local-typedefs -Wno-tautological-undefined-compare -Wno-shift-negative-value
 
 CC          = clang++ -std=c++11 -m32